a=1
x2 + 8x + 15
2x2 + 13x + 15
5x3 + 10x2 + 2x + 4
(x + 2)(5x2 + 2)
x2 + 14x + 40
3x2 +13x + 12
6x3 + 9x2 + 8x + 12
(2x + 3)(3x2 + 4)
x2 + 3x - 18
2x2 + 3x - 20
10x3 + 15x2 - 6x - 9
(2x + 3)(5x2 - 3)
x2 - 9x + 20
8x2 + 14x + 3
14x3 - 21x2 - 2x + 3
(2x - 3)(7x2 - 1)
x2 - x - 72
12x2 - 23x + 10
16x3 + 8x2 + 12x + 6
2(2x + 1)(4x2 + 3)